[@6slyboy6] A race of hive minded changeling then ? 
Or an idea that just "hit me. I totally forgot about it 'till now that is.
A race of brainwashing worms. Let me explain. A race that works as a simbiotic race. They enter their hosts and assume control over them. Giving them enhanced strength and regenerative abilities (nothing OP ofc. Something like a cut would heal in a few hours instead of a day or two).
How does it sound?